What year is this truck again? There’s no connection between oil pressure and fuel injector operation. Don’t bother checking/replacing that. Won’t help.
Now that it’s running, with it idling start giving wiring harnesses a gentle wiggle and tug and see of that kills it.
Taking a closer look at diagrams and tracing back on a copy it looks like it goes streight out of ECM to fuse then to injectors, after that ECRV and EGR solenoid.
Its a 92’
I don’t understand what you’re talking about. You had power at the injectors, but no ground, right? What goes out of the ECM and then to a fuse and EGR? The ground for the injectors comes straight from the ECM and is a dedicated circuit.
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Hopefully this will help, my long overdue posting of schematic with wires highlighted.
Well things just got more interesting, went out and missed around with it a bit. Accidentally forgot to plug injector back on after running a injector to battery volt test, now she cranks maybe a half a crank then dies out. Got under the truck to examine starter and saw a leak around the flywheel housing. Looks green but smears like oil.